/*************************************************************************\
* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
*     National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
*     Operator of Los Alamos National Laboratory.
* EPICS BASE Versions 3.13.7
* and higher are distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution. 
\*************************************************************************/
/*dbStaticLibRun.c*/

#ifdef vxWorks
#include <vxWorks.h>
#include <taskLib.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <string.h>
#include <math.h>
#include <symLib.h>
#include <sysSymTbl.h>   /* for sysSymTbl*/

#include "dbDefs.h"
#include "errMdef.h"
#include "epicsPrint.h"
#include "ellLib.h"
#include "dbDefs.h"
#include "cvtFast.h"
#include "dbStaticLib.h"
#include "dbStaticPvt.h"
#include "special.h"

static char hex_digit_to_ascii[16]={'0','1','2','3','4','5','6','7','8','9',
		'a','b','c','d','e','f'};

static void ulongToHexString(unsigned long source,char *pdest)
{
    unsigned long  val,temp;
    char  digit[10];
    int	  i,j;

    if(source==0) {
	strcpy(pdest,"0x0");
	return;
    }
    *pdest++ = '0'; *pdest++ = 'x';
    val = source;
    for(i=0; val!=0; i++) {
	temp = val/16;
	digit[i] = hex_digit_to_ascii[val - temp*16];
	val = temp;
    }
    for(j=i-1; j>=0; j--) {
	*pdest++ = digit[j];
    }
    *pdest = 0;
    return;
}

static double delta[2]={1e-6,1e-15};
static int precision[2]={6,14};
static void realToString(double value,char *preturn,int isdouble)
{
    long	intval;
    double	diff,absvalue;
    int		logval,prec,end;
    char	tstr[30];
    char	*ptstr=&tstr[0];
    int		round;
    int		ise=FALSE;
    char	*loce=NULL;

    if(value==0.0) {strcpy(preturn,"0"); return;};
    intval=value;
    diff = value - intval;
    if(diff<0.0) diff =-diff;
    absvalue = (value<0.0? -value: value);
    if(diff < absvalue*delta[isdouble]) {
	cvtLongToString(intval,preturn);
	return;
    }
    /*Now starts the hard cases*/
    if(value<0.0) {*preturn++ = '-'; value = -value;}
    logval = (int)log10(value);
    if(logval>6 || logval<-2 ) {
        int nout;

	ise=TRUE;
	prec = precision[isdouble];
	nout = sprintf(ptstr,"%.*e",prec,value);
	loce = strchr(ptstr,'e');
	if(!loce) {
            ptstr[nout] = 0;
            strcpy(preturn,ptstr);
            return;
        }
	*loce++ = 0;
    } else {
	prec = precision[isdouble]-logval;
	if(prec<0)prec=0;
	sprintf(ptstr,"%.*f",prec,value);
    }
    if(prec>0) {
	end = strlen(ptstr) -1;
	round=FALSE;
	while(TRUE) {
	    if(end<=0)break;
	    if(tstr[end]=='.'){end--; break;}
	    if(tstr[end]=='0'){end--; continue;}
	    if(!round && end<precision[isdouble]) break;
	    if(!round && tstr[end]<'8') break;
	    if(tstr[end-1]=='.') {
		if(round)end = end-2;
		break;
	    }
	    if(tstr[end-1]!='9') break;
	    round=TRUE;
	    end--;
	}
	tstr[end+1]=0;
	while (round) {
	    if(tstr[end]<'9') {tstr[end]++; break;}
	    if(end==0) { *preturn++='1'; tstr[end]='0'; break;}
	    tstr[end--]='0';
	}
    }
    strcpy(preturn,&tstr[0]);
    if(ise) {
	if(!(strchr(preturn,'.'))) strcat(preturn,".0");
	strcat(preturn,"e");
	strcat(preturn,loce);
    }
    return;
}

static void floatToString(float value,char *preturn)
{
    realToString((double)value,preturn,0);
    return;
}

static void doubleToString(double value,char *preturn)
{
    realToString(value,preturn,1);
    return;
}


long dbAllocRecord(DBENTRY *pdbentry,char *precordName)
{
    dbRecordType	*pdbRecordType = pdbentry->precordType;
    dbRecordNode	*precnode = pdbentry->precnode;
    dbFldDes		*pflddes;
    int			i;
    char		*precord;
    char		*pfield;
    
    if(!pdbRecordType) return(S_dbLib_recordTypeNotFound);
    if(!precnode) return(S_dbLib_recNotFound);
    precnode->precord = dbCalloc(1,pdbRecordType->rec_size);
    precord = (char *)precnode->precord;
    if(pdbRecordType->rec_size == 0) {
	epicsPrintf("dbAllocRecord(%s) record_size =0\n",
	    pdbRecordType->name);
	return(S_dbLib_noRecSup);
    }
    pflddes = pdbRecordType->papFldDes[0];
    if(!pflddes) {
	epicsPrintf("dbAllocRecord pflddes for NAME not found\n");
	return(S_dbLib_flddesNotFound);
    }
    if(strlen(precordName)>=pflddes->size) {
	epicsPrintf("dbAllocRecord: NAME(%s) too long\n",precordName);
	return(S_dbLib_nameLength);
    }
    pfield = precord + pflddes->offset;
    strcpy(pfield,precordName);
    for(i=1; i<pdbRecordType->no_fields; i++) {

	pflddes = pdbRecordType->papFldDes[i];
	if(!pflddes) continue;
	pfield = precord + pflddes->offset;
	pdbentry->pfield = (void *)pfield;
	pdbentry->pflddes = pflddes;
	pdbentry->indfield = i;
	switch(pflddes->field_type) {
	case DBF_STRING:
	    if(pflddes->initial)  {
		if(strlen(pflddes->initial) >= pflddes->size) {
		    epicsPrintf("initial size > size for %s.%s\n",
			pdbRecordType->name,pflddes->name);
		} else {
		    strcpy(pfield,pflddes->initial);
		}
	    }
	    break;
	case DBF_CHAR:
	case DBF_UCHAR:
	case DBF_SHORT:
	case DBF_USHORT:
	case DBF_LONG:
	case DBF_ULONG:
	case DBF_FLOAT:
	case DBF_DOUBLE:
	case DBF_ENUM:
	case DBF_MENU:
	    if(pflddes->initial) {
		long status;

		status = dbPutStringNum(pdbentry,pflddes->initial);
		if(status)
		    epicsPrintf("Error initializing %s.%s initial %s\n",
			pdbRecordType->name,pflddes->name,pflddes->initial);
	    }
	    break;
	case DBF_DEVICE:
	    if(!pflddes->ftPvt) dbGetDeviceMenu(pdbentry);
	    break;
	case DBF_INLINK:
	case DBF_OUTLINK:
	case DBF_FWDLINK: {
		DBLINK *plink = (DBLINK *)pfield;

		plink->type = CONSTANT;
		if(pflddes->initial) {
		    plink->value.constantStr =
			dbCalloc(strlen(pflddes->initial)+1,sizeof(char));
		    strcpy(plink->value.constantStr,pflddes->initial);
		}
	    }
	    break;
	case DBF_NOACCESS:
	    break;
	default:
	    epicsPrintf("dbAllocRecord: Illegal field type\n");
	}
    }
    return(0);
}

long dbFreeRecord(DBENTRY *pdbentry)
{
    dbRecordType *pdbRecordType = pdbentry->precordType;
    dbRecordNode *precnode = pdbentry->precnode;

    if(!pdbRecordType) return(S_dbLib_recordTypeNotFound);
    if(!precnode) return(S_dbLib_recNotFound);
    if(!precnode->precord) return(S_dbLib_recNotFound);
    free(precnode->precord);
    precnode->precord = NULL;
    return(0);
}

long dbGetFieldAddress(DBENTRY *pdbentry)
{
    dbRecordType *pdbRecordType = pdbentry->precordType;
    dbRecordNode *precnode = pdbentry->precnode;
    dbFldDes	*pflddes = pdbentry->pflddes;

    if(!pdbRecordType) return(S_dbLib_recordTypeNotFound);
    if(!precnode) return(S_dbLib_recNotFound);
    if(!pflddes) return(S_dbLib_flddesNotFound);
    if(!precnode->precord) return(0);
    pdbentry->pfield = ((char *)precnode->precord) + pflddes->offset;
    return(0);
}

char *dbRecordName(DBENTRY *pdbentry)
{
    dbRecordType *pdbRecordType = pdbentry->precordType;
    dbRecordNode *precnode = pdbentry->precnode;
    dbFldDes	*pflddes;
    char	*precord;

    if(!pdbRecordType) return(0);
    if(!precnode) return(0);
    if(!precnode->precord) return(0);
    precord = (char *)precnode->precord;
    pflddes = pdbRecordType->papFldDes[0];
    if(!pflddes) return(NULL);
    return(precord + pflddes->offset);
}

int dbIsMacroOk(DBENTRY *pdbentry) { return(FALSE); }

int  dbIsDefaultValue(DBENTRY *pdbentry)
{
    dbFldDes  	*pflddes = pdbentry->pflddes;
    void        *pfield = pdbentry->pfield;

    if(!pflddes) return(FALSE);
    if(!pfield) return(FALSE);
    switch (pflddes->field_type) {
	case (DBF_STRING) : {
	    char *p = (char *)pfield;
	
	    if(!pflddes->initial) return((strlen(p)==0) ? TRUE : FALSE);
	    return((strcmp(pflddes->initial,p)==0) ? TRUE : FALSE);
	}
	case DBF_CHAR: {
	    char	field = *(char *)pfield;
	    long	ltemp;
	    if(pflddes->initial)  {
		ltemp = strtol(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_UCHAR: {
	    unsigned char	field = *(unsigned char *)pfield;
	    unsigned long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtoul(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_SHORT: {
	    short	field = *(short *)pfield;
	    long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtol(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_USHORT: {
	    unsigned short	field = *(unsigned short *)pfield;
	    unsigned long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtoul(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_LONG: {
	    long	field = *(long *)pfield;
	    long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtol(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_ULONG: {
	    unsigned long	field = *(unsigned long *)pfield;
	    unsigned long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtoul(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_FLOAT: {
	    float	field = *(float *)pfield;
	    double	dtemp;

	    if(pflddes->initial)  {
		dtemp = strtod(pflddes->initial,NULL);
		return((field==dtemp));
	    }
	    return((field==0.0));
	}
	case DBF_DOUBLE: {
	    double	field = *(double *)pfield;
	    double	dtemp;

	    if(pflddes->initial)  {
		dtemp = strtod(pflddes->initial,NULL);
		return((field==dtemp));
	    }
	    return((field==0.0));
	}
	case DBF_ENUM: {
	    unsigned short	field = *(unsigned short *)pfield;
	    unsigned long	ltemp;

	    if(pflddes->initial)  {
		ltemp = strtoul(pflddes->initial,NULL,0);
		return((field==ltemp));
	    }
	    return((field==0));
	}
	case DBF_MENU: {
	    unsigned short	field = *(unsigned short *)pfield;
	    long 		value;
	    char 		*endp;

	    if(pflddes->initial) {
		value = dbGetMenuIndexFromString(pdbentry,pflddes->initial);
		if(value==-1) {
		    value = strtol(pflddes->initial,&endp,0);
		    if(*endp!='\0') return(FALSE);
		}
	    } else {
		value = 0;
	    }
	    if((unsigned short)value == field) return(TRUE);
	    return(FALSE);
	}
	case DBF_DEVICE: {
		dbRecordType	*precordType = pdbentry->precordType;

		if(!precordType) {
		    epicsPrintf("dbIsDefaultValue: pdbRecordType is NULL??\n");
		    return(FALSE);
		}
		if(ellCount(&precordType->devList)==0) return(TRUE);
		return(FALSE);
	}
	case DBF_INLINK:
	case DBF_OUTLINK:
	case DBF_FWDLINK: {
	    struct link *plink = (struct link *)pfield;

	    if(!plink) return(FALSE);
	    if(plink->type!=CONSTANT) return(FALSE);
	    if(plink->value.constantStr == 0) return(TRUE);
	    if(!pflddes->initial) return(FALSE);
	    if(strcmp(plink->value.constantStr,pflddes->initial)==0)
		return(TRUE);
	    return(FALSE);
	}
	default:
	    return(TRUE);
    }
    return(FALSE);
}

char *dbGetStringNum(DBENTRY *pdbentry)
{
    dbFldDes  	*pflddes = pdbentry->pflddes;
    void	*pfield = pdbentry->pfield;
    char	*message;
    unsigned char cvttype;

    if(!pdbentry->message) pdbentry->message = dbCalloc(1,50);
    message = pdbentry->message;
    cvttype = pflddes->base;
    switch (pflddes->field_type) {
    case DBF_CHAR:
	if(cvttype==CT_DECIMAL)
	    cvtCharToString(*(char*)pfield, message);
	else
	    ulongToHexString((unsigned long)(*(char*)pfield),message);
	break;
    case DBF_UCHAR:
	if(cvttype==CT_DECIMAL)
	    cvtUcharToString(*(unsigned char*)pfield, message);
	else
	    ulongToHexString((unsigned long)(*(unsigned char*)pfield),message);
	break;
    case DBF_SHORT:
	if(cvttype==CT_DECIMAL)
	    cvtShortToString(*(short*)pfield, message);
	else
	    ulongToHexString((unsigned long)(*(short*)pfield),message);
	break;
    case DBF_USHORT:
    case DBF_ENUM:
	if(cvttype==CT_DECIMAL)
	    cvtUshortToString(*(unsigned short*)pfield, message); 
	else
	    ulongToHexString((unsigned long)(*(unsigned short*)pfield),message);
	break;
    case DBF_LONG:
	if(cvttype==CT_DECIMAL) 
	    cvtLongToString(*(long*)pfield, message);
	else
	    ulongToHexString((unsigned long)(*(long*)pfield), message);
	break;
    case DBF_ULONG:
	if(cvttype==CT_DECIMAL)
	    cvtUlongToString(*(unsigned long *)pfield, message);
	else
	    ulongToHexString(*(unsigned long*)pfield, message);
	break;
    case DBF_FLOAT:
	floatToString(*(float *)pfield,message);
	break;
    case DBF_DOUBLE:
	doubleToString(*(double *)pfield,message);
	break;
    case DBF_MENU: {
	    dbMenu	*pdbMenu = (dbMenu *)pflddes->ftPvt;
	    short	choice_ind;
	    char	*pchoice;

	    if(!pfield) {strcpy(message,"Field not found"); return(message);}
	    choice_ind = *((short *) pdbentry->pfield);
	    if(!pdbMenu || choice_ind<0 || choice_ind>=pdbMenu->nChoice)
		return(NULL);
	    pchoice = pdbMenu->papChoiceValue[choice_ind];
	    strcpy(message, pchoice);
	}
	break;
    case DBF_DEVICE: {
	    dbDeviceMenu	*pdbDeviceMenu;
	    char		*pchoice;
	    short		choice_ind;

	    if(!pfield) {strcpy(message,"Field not found"); return(message);}
	    pdbDeviceMenu = dbGetDeviceMenu(pdbentry);
	    if(!pdbDeviceMenu) return(NULL);
	    choice_ind = *((short *) pdbentry->pfield);
	    if(choice_ind<0 || choice_ind>=pdbDeviceMenu->nChoice)
		return(NULL);
	    pchoice = pdbDeviceMenu->papChoice[choice_ind];
	    strcpy(message, pchoice);
	}
	break;
    default:
	return(NULL);
    }
    return (message);
}

long dbPutStringNum(DBENTRY *pdbentry,char *pstring)
{
    dbFldDes  	*pflddes = pdbentry->pflddes;
    void	*pfield = pdbentry->pfield;
    long	status=0;

    if(!pfield) return(S_dbLib_fieldNotFound);
    switch (pflddes->field_type) {
    case DBF_CHAR :
    case DBF_SHORT :
    case DBF_LONG:{
	    long  value;
	    char  *endp;

	    value = strtol(pstring,&endp,0);
	    if(*endp!=0) status = S_dbLib_badField;
	    switch (pflddes->field_type) {
	    case DBF_CHAR : *(char *)pfield = value; break;
	    case DBF_SHORT : *(short *)pfield = value; break;
	    case DBF_LONG : *(long *)pfield = value; break;
	    default: epicsPrintf("Logic error in dbPutStringNum\n");
	    }
	}
	break;
    case DBF_UCHAR:
    case DBF_USHORT:
    case DBF_ULONG:
    case DBF_ENUM:{
	    unsigned long  value;
	    char  *endp;

	    value = strtoul(pstring,&endp,0);
	    if(*endp!=0) status = S_dbLib_badField;
	    switch (pflddes->field_type) {
	    case DBF_UCHAR : *(unsigned char *)pfield = value; break;
	    case DBF_USHORT:
	    case DBF_ENUM: *(unsigned short *)pfield=value; break;
	    case DBF_ULONG : *(unsigned long *)pfield = value; break;
	    default: epicsPrintf("Logic error in dbPutStringNum\n");
	    }
	}
	break;
    case DBF_FLOAT:
    case DBF_DOUBLE: {	
	    double value;
	    char  *endp;

	    value = strtod(pstring,&endp);
	    if(*endp!=0) status = S_dbLib_badField;
	    if(pflddes->field_type==DBF_FLOAT)
	    	*(float *)pfield = value;
	    else
		*(double *)pfield = value;
	}
	break;
    case DBF_MENU:
    case DBF_DEVICE: {/*Must allow value that is choice or index*/
	    unsigned short	*field= (unsigned short*)pfield;
	    int			ind;
	    long		value;
	    char		*endp;

	    ind = dbGetMenuIndexFromString(pdbentry,pstring);
	    if(ind==-1) {
		value = strtol(pstring,&endp,0);
		if(*endp!='\0') return(S_dbLib_badField);
		ind = value;
		/*Check that ind is withing range*/
		if(!dbGetMenuStringFromIndex(pdbentry,ind))
		    return(S_dbLib_badField);
	    }
	    *field = (unsigned short)ind;
    	}
	return (0);
    default:
	return (S_dbLib_badField);
    }
    return(status);
}

int dbGetMenuIndex(DBENTRY *pdbentry)
{
    dbFldDes  	*pflddes = pdbentry->pflddes;
    void	*pfield = pdbentry->pfield;

    if(!pflddes) return(-1);
    if(!pfield) return(-1);
    switch (pflddes->field_type) {
	case (DBF_MENU):
	case (DBF_DEVICE):
    	    return((int)(*(unsigned short *)pfield));
	default:
	    errPrintf(-1,__FILE__, __LINE__,"Logic Error\n");
    }
    return(-1);
}

long dbPutMenuIndex(DBENTRY *pdbentry,int index)
{
    dbFldDes  		*pflddes = pdbentry->pflddes;
    unsigned short	*pfield = pdbentry->pfield;

    if(!pflddes) return(S_dbLib_flddesNotFound);
    if(!pfield) return(S_dbLib_fieldNotFound);
    switch (pflddes->field_type) {
    case DBF_MENU: {
	    dbMenu	*pdbMenu = (dbMenu *)pflddes->ftPvt;

	    if(!pdbMenu) return(S_dbLib_menuNotFound);
	    if(index<0 || index>=pdbMenu->nChoice) return(S_dbLib_badField);
	    *pfield = (unsigned short)index;
	    return(0);
	}
    case DBF_DEVICE: {
	    dbDeviceMenu *pdbDeviceMenu;

	    pdbDeviceMenu = dbGetDeviceMenu(pdbentry);
	    if(!pdbDeviceMenu) return(S_dbLib_menuNotFound);
	    if(index<0 || index>=pdbDeviceMenu->nChoice)
		return(S_dbLib_badField);
	    return(dbPutString(pdbentry,pdbDeviceMenu->papChoice[index]));
	}
    default:
	break;
    }
    return (S_dbLib_badField);
}

void dbGetRecordtypeSizeOffset(dbRecordType *pdbRecordType)
{
    char	name[60];
    SYM_TYPE	type;
    STATUS	vxstatus;
    long	status;
    int (*sizeOffset)(dbRecordType *pdbRecordType);

    strcpy(name,"_");
    strcat(name,pdbRecordType->name);
    strcat(name,"RecordSizeOffset");
    vxstatus = symFindByNameEPICS(sysSymTbl, name,
	(void *)&sizeOffset, &type);
    if (vxstatus != OK) {
	status = S_dbLib_noSizeOffset;
	errPrintf(status,__FILE__,__LINE__,"%s",name);
	return;
    }
    sizeOffset(pdbRecordType);
}
